It was during this war with the Brigantes, in which the Roman troops had probably frequently approached the more northern portion of their territories, that the Romans became aware of the name of the people who occupied the country beyond them, and acquired some information connected with these more northern and hitherto unknown districts. They now learned the existence of a people to the north of the Brigantes, whom they termed ‘Caledonii Britanni,’ or Caledonian Britons.[36] The Western Sea which bounded them they termed the ‘Caledonius Oceanus.’[37] The war under Vettius Bolanus had, it was supposed, reached the Caledonian plains.[38] On the conclusion of the war the Roman province approached the vicinity of the ‘Sylva Caledonia,’ or Caledonian Forest.[39] They now knew of the ‘Promontorium Caledoniæ,’ or Promontory of Caledonia, by which they must have meant the peninsula of Kintyre. From thence could be seen the islands of the Hebudes, five in number;[40] and they had heard reports of a singular state of society among their inhabitants. It was reported that they knew nothing of the cultivation of the ground, but lived upon fish and milk, which latter implies the possession of herds of cattle. They had, it was said, one king, who was not allowed to possess property, lest it should lead him to avarice and injustice, or a wife, lest a legitimate family should provoke ambition.[41] In short, they learned that there existed among this new people a state of society similar to that which Cæsar reported to have found among the indigenous inhabitants of the interior of Britain. The Orkneys they already knew by report. The name of Thule was familiar to them as an island whose situation and attributes were entirely the creation of imagination. The geographers knew of it as a remote island in the Northern Ocean, the type of whatever was most northern in the known western world, as the expression Hyperborean had been to the Greeks. The poets applied it as a poetical appellation for that part of Britain which remained inaccessible to the Roman arms, the seat of the recently known Caledonian Britons, and which, from the deep indentation into the country of the Firths of Forth and Clyde, and the narrow neck of land between them, presented the appearance as if it were, to use the words of Tacitus, another island. The peculiar customs of the ruder Britons are attributed to these inhabitants of the poetic Thule. They are termed ‘Cærulei’ or Green, from the woad with which they stained their bodies; and they are said to have fought in chariots.[42] [Sidenote: A.D. 78. Arrival of Julius Agricola as governor.]